Matthew w



(No Model.)

IVI. W. LYNCH.

LOCK BUCKLE.

No. 818,569. Patented May 26, 1885.

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NiTnn STaTns FaTnNT @Trina MATTHEWT XV. LYNCH, OF MADISON, VISCONSIN.

LOCK-BUCKLE.

SPECIFICATION' forming part of Letters Patent No. 318,569, dated May 26,1885.

Application filed October i4, 1884. (No model.)

To all whom it may con/cern:

Be it known that l, MATTHEW W. LYNCH, of Madison, in the county of Daneand State of W'isconsin, have invented certain new and usefulImprovements in Lock-Buckles; and I do hereby declare the following tobe a full, clear, and exact description of the same, reference being hadto the accompanying drawings, forming apart of this specification, andto the figures and letters of reference marked thereon.

The object of my invention is to provide a buckle of neat and simpleconstruction in which the tongue is adapted to be locked when desired.

I will first describe my invention at length, and will then point outwhat I deem its patentable features in the claims at the end of thisspecification.

In the accompanying drawings, Figure l is a perspective view of a buckleconstructed in accordance with my invention, the tongue being shownlocked and thekey removed. Fig. 2 is a plan view showing the tongueunlocked; Fig. 3, a View of the key; Fig. 4, a sectional view taken onthe line :ref Fig. l; Fig. 5, a longitudinal sectional view takenhorizontally through the buckle-frame, the tongue, and lookin gmechanism.

Similar letters of reference inthe several figures indicate the sameparts.

The letter A indicates the buckleframe, composed of two side bars, a c,an end bar, b, to which the tongue dis pivoted, and another end bar, c,made hollow to receive a locking bolt or cylinder, e, and having a slotor recess, f, with which the outer end of the tongue is adapted toengage. The locking-cylinder c fits snugly Within the hollow bar c ofthe buckle-frame, and is prevented from longitudinal movement therein bymeans of a pin or stud, g, inserted in it and projecting through alateral slot, 7L, in the hollow bar c, as shown in Figs. l and 2, saidpin and slot, however, permitting a partial rotation of said lockingcylinder. The locking-cylinder is further provided opposite the slot orrecess f of the bar c, in which the end of the tongue is adapted torest, with a groove, t', which, when the cylinder is unlocked,corresponds in outline to the said slot f, in the frame and permits theend of the tongueto be swung in and out.

Upon the turning of the cylinder, however, the end of the tongue isclasped by the cylinder, as shown in Fig. 5, and is prevented from beingwithdrawn.

In one or both of the side bars, a a, but preferably in both,longitudinal recesses are formed, in which work spring-seated pins kk,and in the locking-cylinder, opposite the spring-pins, are formedperforations, in which are located smallsliding pins p, against whichthe spring-seated pins are adapted to abut, such pins p extending into alongitudinal keyslot,Z, extending from end to end of thelockingcylinder, as shown in Figs. 4 and 5. Then the locking-cylinder isturned into the position shown iu Figs. l and 5, the end of the tongueis confined by the cylinder and the spring-seated pins are projectedinto the corresponding perforations in the cylinder against the slidingpins p, thus securely locking the cylinder and preventing its rotation.To unlock the cylinder it is only necessary to introduce the key (shownin Fig. 3) into the longitudinal key-slot Z, whereupon the sliding pinsin the cylinder will be forced outward and disengage the springseatedpins from the cylinder, and allow the latter to be turned and the tongueto be liberated. Vhile the cylinder is thus turned the key may bewithdrawn, and the tongue may be again subsequently locked by thecylinder by swinging it down and turning the cylinder, not by the key,but by the stud or projection g, which protrudes through the slot lt. Byforming the pins which slide within the locking-cylinder of diiierentlengths and making corresponding prominences or depressions upon thekey, each lock may be rendered incapable of being opened by any otherkey than that specially provided for it.

It will be observed that a buckle constructed as I propose does notmaterially differ in exterior appearance from an ordinary buckle, thoughits tongue-locking feature renders it serviceable for uses to which theordinary buckle is not adapted-forinstance, for application to hospitalrestraints,such as used in asylums for the insane, &c.

I claim as my invention- 1. The buckle-frame having the hollow bar IOOand provided with the seat for the end of the tongue,kin combinationwith the tongue and rotating locking-cylinder arranged within the hollowbar of the frame and adapted to eonfine the end of the tongue to itsseat, substantially as described.

2. The combination of the buckle-frame having the hollow bar providedwith the seat for the end of the tongue, and the lockingcylinderoperating, when turned, to confine the end of the tongue, and having thelateral pin or stud projecting through the slot in the tubular bar andserving to prevent longitudinal movement of the cylinder, and also as ameans for turning the cylinder in its bearings, substantially asdescribed.

end of the tongue provided with the lateral perforations and slidingpins, and with the longitudinal key-slot, the whole constructed 25 andarranged substantially as described.

MATTHEW W. LYNCH.

Witnesses:

J. L. GILMORE, R. G. SIEBECKER.

